Flexible hose adapted for couplings, &amp;c.



L 40 w, nu n u l. d nv t n e. t a P Y H E M 0 G T N 0 M M om 3 nl. 2 0 7 o. N

FLEXIBLE HOSE ADAPTED'FOR COUPLINGS, 81.0.

(Appucatin med Aug, 1s, 1901.)

'um Model.)

In, A

wif/7656@ UNITEDA STATES PATENT OFFICE;

MARSHALL MONTGOMERY, OF PIIILADELPHIA, PENNSYLVANIA- FLEXIBLE HOSE ADAPTED FOR COUPLINGS, 81,6.

srEcIFIcATIoN 4farming par@ of Letters Patent No. 702,738, dated June 17, 1902.

'A'ppimnn inea Anglia" isfieoi.' saranno.' 71.9161 (No'nidaei.)

To all whom t 11i/ty concern.-

Beit known that I, MARSHALL MONTGOM- ERY, of the city and county of Philadelphia, Pennsylvania,have invented an Improvement. in Flexible Hose Adapted for Couplings, &c. of which the following is a speciiication My invention has reference to flexible hose 'adapted for couplings', 1&0.; and it consists'of certain improvements Vfully set forth in the following specification, and shown in the ac' companying drawings, which form a part thereof.

The object of my invention is to provide a construction of hose especially adapted for use as a universal coupling-joint betweenv pipe-sections ot' large dredging apparatus in which the pipes are supported upon pontoons and connectedby theiiiexible couplings. In this class of 'work the ipipes'fand@couplings must be capable of withstanding great strains or pressure due to the water within the pipes, as well as stones and heavy material which are driven through them, and which would cause ordinary rubber coupling-tubes to swell out or become ruptured. Couplings between the metal pipes so supported on pontoons must also have great iiexibility and compressibility, because the ends of the pipes are constantly shifting vertically, laterally, and also to and Vfrom each other. Light coils of wire within the rubber coupling-tubes will not suffice for strength, and would be bent and distorted, and heavy rods coiled and embedded in the rubber, while giving strength, would not have the flexibility and yielding qualities required and would cut and destroy the more delicate rubber of the tube under the great motions and strains due to the hard usage to which it is subjected.

My object is to provide a form of flexibleV coupling which shall secure the requirements of strength, coupled with the essential requisites of flexibility and yielding qualities to avoid-bulging, distortion, and bursting,on the one hand, and permitting compression, with iiexibilityand freedoxnlof movement without danger ofrinjury tothe metal coil or rubber tube, on the other hand;

In carrying out my invention I provide the rubber tubingwith a metallic coil of flexible wire or cable embedded within the body of the rubber and preferably nearer to theouter surface thanto the inner surface. In this great strength against stretching and hence `protects the rubber tube against bulging under heavy loads or pressure, and has also great yexibilityand hence allows the tube to be twisted', collapsed, lor even doubled upon itself without injury to the coupling.

Where the tubing is to be employed as a coupling between pipes in dredging apparatus orfor other purposes, I prefer to arrange the metallic coil so that it'termiuates at a: considerable dis- `tance from each end of the tube-section to make the end portions better adapted to be yclampediuponthe'endof the said tubes and avoid`l the' possibility ofthe metal of the coil cutting v`th rough thle 'rubberunder the compression of the clamp.

My invention will be better understood by reference to the drawings, in which- Figure l isan'elevation showing a dredging pipe-line embodying my improvement. Fig. 2 is an elevation,`with part in section, of

a coupling-tube embodying my inventi0n.` l

Fig. 3 is a cross-sectioniof same. Fig. 4 is an elevation of portions of the iiexible wire cable and textile covering used as the coil in the coupling; and Fig. 5 isan elevation of a form of-clamp adapted for clamping my improveds rubber tubing or hose upon the end ofapipe. Y i

A represents pontoons-which support the toons are coupled byrubber-hose coupling-sections O, clamped at the ends of the pipes by the clamps D. In this manner the iron pipes are flexibly connected and compensate for the motions of the pontoons. In practice it is `iron pipes B. Thepipes B on the several ponfrequently necessary that these couplings O a should be twenty inches or more indiameter, and it is evident that when rubber tubing is made of this size it is not suiciently strong against expansion. When solid wire is coiled about or within` the rubber of the' tube to strengthen it, it soon destroys itself and also the rubber, and, moreover,- does not give the flexibility required to compensate for the shifting of the pipe ends under the rocking of the pontoons.

In making my improved rubber tubing adapted for couplings I form the tube C of rubber Gr of short length, with one or more layers of cloth or textile material II, in the customary manner. Outside of this cloth is preferably a second layer of rubber,and upon this is placed a metallic coil of flexible Wire cable I. Over this coil of Wire is placed an outer layer of rubber J, and all of said parts are vulcanized together so as to form one concrete body with the metallic flexible coil wholly embedded Within the rubber, thereby not only preventing the undesirable expansion of the tube, but also permitting the coupling to have the greatest flexibility and compressibility without injury to the coil or to the rubber. To further strengthen the construction, I may coat the flexible wire cable of the coilI with textile material, as indicated at fr' in Fig. 4, said textile material being braided or Wrapped about the cable. This textile material covering to the cable may be saturated With a rubber compound adapted to be vulcanized, and thereby firmly attached to the rubber coatings G' and J. In this manner a textile spiral tube is formed incasing the metallic flexible coil, thus preventing any possibility of the coil cutting through or destroying the rubber under any severe action. Where the tubingis intended specifically to be used for coupling tWo pipes together, as shown in Fig. l, it is desirable that the flexible metallic coil I shall terminate at a considerable distance from each end of the rubber tube-section, as indicated in dotted lines in Fig. 2, so as to leave only the rubber to be clamped by clamps D. As shown, these clamps consist of a band of iron E, the two ends of which are connected to a lever F at' slightly-separated places, and said lever is adapted to be drawn over and screwed down in position by a screw f, thereby producing great circumferential clamping action upon the rubber tube. Any other suitable form of clamp may be employed in place of that shown. The internal construction ofthe rubber tube may be varied, if so desired. Therefore I do not limit myself to the use of the textile material H, although I deem the same preferable.

By making the metallic coil of a llexible cable or twisted Wire strands, as shown, great strength is secured Without impairing the flexibility or elasticity of the hose as an entirety, and this is especially advantageous in the case of large coupling-sections.

The pipe-coupling constructed as above set out has the rubber strengthened by a freely-flexible metallic coil yieldable in all directions Without material resistance. By the term freely flexible, I mean to distinguish my coil from the usual form of solid Wire coil, which is not capable of being collapsed or bent into shapes other than circular Without becoming set and injured.

My coil is further distinguished by being yieldable in all directions without material resistance, because the coils may be flattened under normal action and at once reassume their former circular shape Without injury, Whereas in prior solid Wire coils there is no yieldability in any direction which Will permit the coil to assume other than a circular shape in cross-section.

My invention comprehends any metallic coil of such yielding and ilexible character that it may Without injury be bent and caused to assume any shape desired, so that the rubber tube may be bent or flattened freely Withou t injury to the coil.

While I prefer the construction shown, I do'not limit myselt to the minor details, as these may be modified in various Ways Without departing from my invention.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. A pipe-coupling consisting of a rubber tube combined with a freely-flexible metallic coil yieldable in all directions Without material resistance and embedded Within the rubber walls of the tube so as to be Wholly covered, the said coil permitting the tube to collapse when necessary Without injury to said tube or itself.

2. A rubber-tube coupling combined with a spiral textile tube encircling the rubber tube and Wholly embedded Within the rubber of the tube and also terminating at a considerable distance from each end thereof, and a flexible metallic cable inclosed within the spiral textile tube and thereby held out of contact with the rubber of the tube andleaving the ends of the rubber tube without metal.

A pipe-coupling consisting of a rubber tube combined with a metallic coil of twisted Wires coiled into a helix and Wholly embedded in the walls ol the rubber tube.

In testimony of which in vention I hereunto set my hand.

MARSHALL B'IONTGOMERY.

Witnesses:

R. M. HUNTER, J. XV. KnNWoR'rriY.

IOO 

